A ray of light is incident on a right an...

A ray of light is incident on a right angled isosceles prism parallel to its base as shown in the figure. Refractive index of the material of the prism is `sqrt(2)`. Then which of the following statements (s) is /are true?

The reflection at P is total internal.

the reflection at Q is total internal.

The ray emerging at R is parallel to the ray incidet at S.

Total deviation of the ray is `150^(@)`

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